These desktop printers can handle small to medium-sized labels with a maximum width of 118 mm. The CL-S621 prints pin-sharp logos, pictures and barcodes particularly efficiently with 8 dots/mm (203 dpi), the CL-S631 with 12 dots/mm (300 dpi). A speed of up to 150 mm per second always ensures fast production and impresses with short waiting times.

The entire printhead mechanics is based on a sturdy metal structure that opens wide enough to make roll and ink ribbon changes as easy as possible. With thermal transfer ribbons of up to 360 m in length, print about 6,800 labels without ink ribbon changes, reducing interruptions to a minimum. The adjustable media sensor has been optimised in the new version and guarantees absolute accuracy as well as hundred percent correct placement, which is critical for frequently changing media. High reliability, durable, stable construction and the extendible, adaptive concept make the Citizen CL-S621/631 a first-choice label printer.